Yes. It literally means 'lowlands'.
The word crises is a plural word; it is the plural form of the word crisis.
There is no plural word for if.
Yes it is. In fact, "the Netherlands" is a plural form, just like, for example, " the Grenadines" or "the Bahamas".
The plural form for the demonstrative pronoun this is these.
A non-plural word, a word (noun or pronoun) that is not plural is singular, a word for just one.
The plural word of delay is delays.
the plural word is comedones
No it's a singular word. A plural word would be "have".
Leukocytes is the plural of leukocyte
The plural noun is raisins.
The plural of "classification" is "classifications."
The correct plural for the word "wolf" is "wolves."